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Pilot Volume

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: psycix » Sun May 25, 2008 6:10 am

Travel and pilot volume are direct proportional to eachother. Just multiply the travel by pi*r*r.

And for the T=D/4 rule, it determines the MINIMAL piston travel. And thus can help one figuring out how much travel and thus pilot volume one should have.



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Unread postAuthor: sniper hero » Sun May 25, 2008 11:52 am

in my new design for a gun the pilot volume is big does this matter ?
does it have to be very very overkill to not work ?
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Unread postAuthor: STHORNE » Sun May 25, 2008 12:37 pm

sniper hero wrote:in my new design for a gun the pilot volume is big does this matter ?
does it have to be very very overkill to not work ?


it would decrease performance and might not work but it all depends on the pressures you use and how big the pilot volume actually is.

But stay on topic, this isn't your thread so don't high jack it with your problems and concerns, make your own topic.
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Unread postAuthor: psycix » Sun May 25, 2008 12:47 pm

sniper hero wrote:in my new design for a gun the pilot volume is big does this matter ?
does it have to be very very overkill to not work ?


Define "big".
If youve got yourself a good pilot valve (large in diameter) and a piston that seals off well (o-rings) then it will work, no matter how large your pilot volume is.
BUT less pilot volume = faster opening.
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Unread postAuthor: sniper hero » Sun May 25, 2008 5:00 pm

ok thnx
I asked it in this topic because I thought it wasn't worth a new one
and yes my pilotvalve is big
but I think I know enough :D
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